The use of loud, abusive, or profane language, except as part of an authorized practical training exercise, unwarranted loitering, unauthorized assembly, the creation of any hazard to persons or things, improper disposal of rubbish, or the commission of any disorderly conduct on the property is prohibited. Prohibited actions in the preceding sentence are limited to those actions which impede, obstruct, or otherwise interfere with the Government's business which includes, among other things, the maintenance of the facility, protection of persons and property, and the smooth administration of academic activities and supporting services. The entry, without specific permission, upon any part of the property to which authorized visitors do not customarily have access, is prohibited.